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Addition and Subtraction Fluency Within 20: math test solutions, Grade 2 – download the PDF

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Test solutions Grade 2 : Addition and Subtraction Fluency Within 20 — Zyro the alien explorer of Planète Maths

Test solutions with the detailed point scale. Add up your points and spot what to review.

Suggested time: 45 minutes. Out of 20 points. Calculator allowed only when the problem says so.

1 Doubles and near doubles / 4 pts

  1. \(8+8=16\) (1 pt)
  2. \(5+5=10\) (1 pt)
  3. \(5+5=10\), so \(5+6=11\) (1 pt)
  4. \(8+8=16\), so \(8+9=17\) (1 pt)

2 Make ten / 3 pts

  1. \(9+1=10\), then \(10+4=14\) (1 pt)
  2. \(8+2=10\), then \(10+4=14\) (1 pt)
  3. \(6+4=10\), then \(10+5=15\) (1 pt)

3 Fact family / 3 pts

\(4+7=11\) and \(7+4=11\) (1 pt). \(11-4=7\) (1 pt). \(11-7=4\) (1 pt).

4 Missing addends / 3 pts

  1. \(13-5=8\) (1 pt)
  2. \(17-8=9\) (1 pt)
  3. \(18-9=9\) (1 pt)

5 Even or odd / 3 pts

(a) 14 even, 19 odd, 10 even, 13 odd (2 pts, 0.5 pt each). (b) No. 15 is odd, so one pencil is left over (1 pt).

6 Marbles / 4 pts

  1. \(9+6+3\): \(9+3=12\), then \(12+6=18\). Ben has 18 marbles. (2 pts)
  2. \(18-9=9\). He has 9 marbles left. (1 pt)
  3. 9 is odd. (1 pt)
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